Refrigerating apparatus.



"No. 726,216. "PATENTE'D. APR. 21,1963

0, J. COLEMAN. RBFRIGERATING APPARATUS.

APPLICATION FILED SEPT. 9, 1899. BEN EWED JULY 24, 1902.

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UNITED STATES PATENT OFFICE.

CLYDE J. COLEMAN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO CLARENCE W. COLEMAN.

REFRIGERATING APPARATUS.

SPECIFICATION formingpart of Letters Patent No. 726,216, dated April 21, 1903; Application filed September 9, $99. Renewed July 24, 1902. Serial No. 116,777. (No model.)

To all whom it may concern.-

Be it known that I, CLYDE J. COLEMAN, a citizen of the United States,,residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Refrigerating Apparatus, (Case D and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accom- 1o panying drawing, forming a part of this specification.

The present invention relates to that type of refrigerating apparatus in which positive means areemployed towithdraw the expanded refrigerant medium from the expansion or cooling chamber and to force such expanded medium into the condensing or storage chamber to attain a continued cycle of operations in the system.

The object of the present improvement is to provide a simple, durable, and efficient means whereby the refrigerant medium is transferred from the expansion-chamber for continued reuse in efiecting the cooling operation of the apparatus and in which a liquid seal is employed between'the expansion and storage chambers of the system and which liquid is adapted to determine the degree of compression within such storage-chamber,the

0 present invention involving also the actual transfer of the refrigerant medium through such liquid seal, all as will hereinafter more fully appear and be more particularly pointed outin the claims. I attain such objects by the construction and arrangement of parts illustrated in the accompanying drawing, which is a general elevation, partly in section, illustrating the preferred form of the present invention. 7

0 Referring to the drawing, 1 represents the storage or condensing coil or chamber; 2, the expansion-valve; 3, the expansion-chamber or coil in which the refrigerant medium is expanded to effect the cooling operation of the system, and 4 the compression apparatus by which the expanded refrigerant medium is taken from the expansion-chamber and forced or compressed into the storage-chamber, from which it is again expanded within the expansion-chamber in a closed and continuous cycle of operations.

The above-described members of a refrig erating apparatus or system are, in a broad sense, usual to the present type of refrigerat ing apparatus or system and may be of'any well-known and approved construction and be connected together in any usual manner.

Inthe accompanying drawing, illustrative of the present invention, the outlet end of the compressing apparatus 4 is connected by pipe connection 5 with the condensing-chamber 1. The condensing-chamber l is connected to the expansion or cooling chamber 3 by a pipe connection 6, in which is arranged the expansionvalve 2, and the expansion-chamber is in turn connected with the inlet end of the compressing apparatus by the return-pipe connection 7.

The present improvement in the above-described type of refrigerating apparatus involves, broadly, the combination, with a mechanically-operated pump, of any suitable description of a liquid seal arranged between the condensing and the expansion sides of the apparatus and also involves the actual passage of the refrigerant medium through such liquid seal.

In my preferred type of apparatus (illustrated in the drawing) the pump or compressor by which the expanded. and attenuated refrigerant medium as it comes from the expansion-chamber is forced into the condensing-chamber in the required state of condensation or compression for reuse in efiecting a continued cooling action of the apparatus will comprise a closed and verticallyelongated tank or casing 4, having an inletopening near its top having pipe connection 7 with the expansion-chamber, and a centrally-arranged compression-chamber 4: within the interior of the tank or casing, such in- 0 ner -chamber having an open bottom, a closed top, and an outlet connecting with the pipe connection 5 of the condensing or storage chamber 1. Within the chamber or tank 4 is arranged an endless series of buckets 8, 5 supported by top and bottomspider or other suitably-formed wheels 9 9, one or both of which may act as drivers for the endless series of buckets and for such purpose have operative connection with any suitable source of motive power. In the described construction the chamber or tank will contain a vertical column or body of mercury or other suitable liquid, the height of which will determine the degree of compression maintained upon the refrigerant medium within the condensing or storage chamber of the apparatus, in that the succeeding volumes of the refrigerant medium carried from the upper end of the main tank 4 and down through the liquid, mercurial, or other seal and discharged into the compression column or chamber 4- will gradually displace such liquid seal from the interior of such compression-column into the outer chamber at to maintain difierential columns in the two vertical chambers and the required degree of compression Within the compression-columns and the condenser or storage chamber of the apparatus to which it is connected.

Having thus fully described my said inven tion, what I claim as new, and desire to secure by Letters Patent, is

1. In a refrigerating apparatus of the character herein described, the combination with the condensing chamber, the expansive chamber, and the compressor, ofa liquid seal interposed between the expansion and compression ends of the apparatus and so arranged as to constitute both a fluid column adapted to determine the difference in pressure between the expansion and the storage chambers of the system and a fluid seal through which an actual transfer of the refrigerant medium takes place, substantially as set forth.

2. In a refrigerating apparatus of the character herein described, the combination with the condensing chamber, the expansionchamber, and the compressor, of a liquid seal interposed between the expansion and compression ends of the apparatus and so arranged as to constitute both a fluid column adapted to determine the difference in pressure between the expansion and storage chambers of the system and a fluid seal through which an actual transfer of the refrigerant medium takes place, the said compressor comprising a closed receiving-column, a compression-column and an endless series of pumpbuckets, substantially as set forth.

In testimony whereof Witness my hand this 4th day of September, 1899.

ROBERT BURNS, M. H. HOLMES. 

